I almost did that with my novel - I'm on Ch 15, and someone helped me out with the first few chapters (no one from this site - don't worry) - and she had nothing nice to say about my main character. Details aren't needed, but it came down to her not liking my main character's concern over her appearance (she's ean, muscular, and wearing ratted old work clothes when she meets a guy. She prefers to have met him while she was wearing decent clothes - looking her best, instead).
Well - I let this person's comments about my character eat away at me for quite some time, to the point of me considering a redo of my character (which would have overhauled the entire book).
Just as I was about to give in and shift gears - I went to look over that person's comments again and realized that in her PHOTO - her real photo of herself - she's decked head to toe in clothes that my MC WEARS when she dresses up. Hello - makeup, jewelry, even the same colors.
I laughed my ass off. I was about to rewrite a character because someone critiqued my story and didn't like how my MC was even though they actually dress ALIKE. I even wrote her and asked if that was her real photo and she said yes.
See - never let someone's negativity bring you down. If they don't like your characters or what you've written to the point of finding nothing beneficial to offer as far as a critique goes then they aren't going to be buying the book - they won't be a fan. It's that simple. odds are, it's personal to them. I have a feeling that she wasn't being objective *of* my MC when she critiqued it, but instead, she was being opinionated *about herself*
It's impossible to please everyone, don't bother.